Table of Contents

Overview

XXX from the XXX Research Team is looking to engage in consultation with the Telethon Kids Institute’s Biometrics team to undertake statistical analysis to determine brief project summary.

Study overview to put the analysis in context.

Research Questions

  1. Research Question 1
  2. Research Question 2

Summary of Findings

Tables

Table 1: Caption

Sepal.Length Sepal.Width Petal.Length Petal.Width Species
5.1 3.5 1.4 0.2 setosa
4.9 3.0 1.4 0.2 setosa
4.7 3.2 1.3 0.2 setosa
4.6 3.1 1.5 0.2 setosa
5.0 3.6 1.4 0.2 setosa
5.4 3.9 1.7 0.4 setosa

Figures

Figure 1: Caption.

Figure 2: Example of ā€˜jtools::plot_summs()’.

Models

term estimate conf.low conf.high
(Intercept) 2.39 1.88 2.90
Sepal.Width 0.43 0.27 0.59
Petal.Length 0.78 0.65 0.90
Speciesversicolor -0.96 -1.38 -0.53
Speciesvirginica -1.39 -1.95 -0.83

Model Diagnostics

Influential Observations

       StudRes        Hat       CookD
15   2.5271587 0.05159448 0.066998220
42   0.3632216 0.10113854 0.002986792
85  -2.7387914 0.02384169 0.035068507
101 -2.5894556 0.02991757 0.039792767
107 -2.2510898 0.06241849 0.065630415
119  0.7861327 0.12817960 0.018220458

Linearity of Relationships

Consitancy of Error Variance (homoscedasticity)

Non-constant Variance Score Test 
Variance formula: ~ fitted.values 
Chisquare = 4.127549, Df = 1, p = 0.04219


Suggested power transformation:  -0.5620567 

Normality of Errors

[1]  85 101

Collinearity

GVIF Df GVIF^(1/(2*Df))
1.946902 1 1.395314
19.898536 1 4.460778
27.111945 2 2.281866


$$ \sqrt(model) > 2 $$

GVIF Df GVIF^(1/(2*Df))
FALSE FALSE FALSE
TRUE FALSE TRUE
TRUE FALSE FALSE

Commentary

Reference (Stevenson and Cooper 2019).

End Matter

Reproducible Research Information

This document was prepared using the software R, via the RStudio IDE, and was written in RMarkdown.

## R version 3.6.0 (2019-04-26)
## Platform: x86_64-w64-mingw32/x64 (64-bit)
## Running under: Windows 8.1 x64 (build 9600)
## 
## Matrix products: default
## 
## locale:
## [1] LC_COLLATE=English_Australia.1252  LC_CTYPE=English_Australia.1252   
## [3] LC_MONETARY=English_Australia.1252 LC_NUMERIC=C                      
## [5] LC_TIME=English_Australia.1252    
## 
## attached base packages:
## [1] stats     graphics  grDevices utils     datasets  methods   base     
## 
## other attached packages:
##  [1] jtools_2.0.1          captioner_2.2.3       GGally_1.4.0         
##  [4] broom_0.5.2           kableExtra_1.1.0      knitr_1.23           
##  [7] biometrics_1.0.4      ProjectTemplate_0.9.0 car_3.0-3            
## [10] carData_3.0-2         lubridate_1.7.4       forcats_0.4.0        
## [13] stringr_1.4.0         tibble_2.1.1          purrr_0.3.2          
## [16] readr_1.3.1           tidyr_0.8.3           dplyr_0.8.1          
## [19] ggplot2_3.1.1         repmis_0.5           
## 
## loaded via a namespace (and not attached):
##  [1] Rcpp_1.0.1         lattice_0.20-38    assertthat_0.2.1  
##  [4] digest_0.6.19      R6_2.4.0           cellranger_1.1.0  
##  [7] plyr_1.8.4         backports_1.1.4    ggstance_0.3.1    
## [10] evaluate_0.13      highr_0.8          httr_1.4.0        
## [13] pillar_1.4.0       rlang_0.3.4        lazyeval_0.2.2    
## [16] curl_3.3           readxl_1.3.1       rstudioapi_0.10   
## [19] data.table_1.12.2  R.utils_2.8.0      R.oo_1.22.0       
## [22] rmarkdown_1.13     labeling_0.3       webshot_0.5.1     
## [25] pander_0.6.3       foreign_0.8-71     igraph_1.2.4.1    
## [28] munsell_0.5.0      compiler_3.6.0     xfun_0.7          
## [31] pkgconfig_2.0.2    htmltools_0.3.6    tidyselect_0.2.5  
## [34] rio_0.5.16         reshape_0.8.8      viridisLite_0.3.0 
## [37] crayon_1.3.4       withr_2.1.2        MASS_7.3-51.4     
## [40] R.methodsS3_1.7.1  grid_3.6.0         nlme_3.1-139      
## [43] gtable_0.3.0       magrittr_1.5       scales_1.0.0      
## [46] zip_2.0.2          stringi_1.4.3      xml2_1.2.0        
## [49] generics_0.0.2     openxlsx_4.1.0.1   RColorBrewer_1.1-2
## [52] tools_3.6.0        R.cache_0.13.0     glue_1.3.1        
## [55] hms_0.4.2          abind_1.4-5        yaml_2.2.0        
## [58] colorspace_1.4-1   rvest_0.3.4        haven_2.1.0

References

Stevenson, Paul, and Matthew Cooper. 2019. Biometrics: Report Templates for the Telethon Kids Institute.